STAR HardProbes PWG

[Yi Yang <yiyang0429 AT gmail.com>]

Hi Veronika,

Thanks a lot for the updated version. I don't have any further comments.

Cheers,

Yi

On Tue, Aug 29, 2023 at 4:23 PM Veronika Prozorova <v.d.prozorova AT gmail.com> wrote:

Hi Isaac, Yi,

Thank you for your comments. I have implemented them, please, take a look at the new version of the poster: https://drupal.star.bnl.gov/STAR/system/files/PosterQM23_Prozorova_ver5.pdf

Isaac, I tried to change the HFE section, however, it was hard to rephrase some sentences to look nice and short. I decided to make it in bullets (as they read better than a paragraph) and reduced words in some places as much as I could.
Regarding the point in Fig.4, yes, it is some overflow or edge effect. As I do not use this region in these pt bins, I have cut the histograms.
The motivation of using 54.4 GeV is in the end of the abstract.

Yi, thank you for the explanation. Now I get what you meant. Indeed, it looks confusing. I have changed "reconstruction" to "identification". 

Best regards,

Veronika 

вт, 29 авг. 2023 г. в 08:47, Yi Yang <yiyang0429 AT gmail.com>:

Hi Veronika,

Thanks a lot for the updated version and reply. I don't have any further comments on it. 

I think I didn't say it clearly. I am aware of all the analysis notes you shared, I just think using "reconstruction" will be confusing since in the equation you have N_PE/epsilon_EP/epsilon_total. It looks like you correct "reconstruction", meaning TPC tracking, twice. 

Please take a look at the published paper: https://arxiv.org/pdf/2303.06590.pdf 

Here we used: εPHE is the PHE identification efficiency 

This will have less confusion, for your consideration. 

Cheers,

Yi

On Mon, Aug 28, 2023 at 6:54 PM Veronika Prozorova <v.d.prozorova AT gmail.com> wrote:

Hi Yi, Nihar,

Thank you for your comments. I have also added Barbara's name to the authors on the poster. Unfortunately, due to the fact that I still didn't get the visa Barbara will present my poster as my supervisor. Please, find the new version here: https://drupal.star.bnl.gov/STAR/system/files/PosterQM23_Prozorova_ver4.pdf

You can find my answers to your suggestions/questions below.

Nihar:

As there is not much space on the poster to include the HFEv2 plot, we decided to add the sentence about the planned Rcp calculation in the Abstract.

Yi:

Thank you very much for the transparent logo! I am a bit confused why one could think that I correct electron reconstruction efficiency twice. The photonic electron reconstruction efficiency is calculated as a combination of individual efficiencies from gamma conversion, pi0 and eta Dalitz decays in the same way as it was done  here: https://drupal.star.bnl.gov/STAR/system/files/NPE_v2_5427_note_Jan13.pdf (page 22). There are also another notes using it, here:  https://drupal.star.bnl.gov/STAR/system/files/ppHFERun12_0.pdf (page 20) or  here: https://drupal.star.bnl.gov/STAR/system/files/AuAu_HFE_anaNote_v4.pdf (page 15).  Everywhere in these notes it is called photonic electron reconstruction efficiency and is used to correct the photonic electron yield. Here is also a presentation from HP pwg meeting where I showed how I calculate it https://drupal.star.bnl.gov/STAR/system/files/HFE54.4GeV_6Apr2023.pdf (slides 19-21).

Please, let me know if you have any further questions.

Best regards,

Veronika 

пн, 28 авг. 2023 г. в 11:09, Yi Yang <yiyang0429 AT gmail.com>:

Hi Veronika,

I think we are using this drupal entry (https://drupal.star.bnl.gov/STAR/node/64956).  

I have some minor comments on ver3 for your consideration. 

 - Eq. 1: should "photonic electron reconstruction efficiency" be the "photonic electron conversion efficiency"? Using "reconstruction" is a bit strange and one (me) might have thought you correct electron reconstruction efficiency "twice".

 - You can use the attached logo with a transparent background in your poster. 

Cheers,

Yi

On Sun, Aug 27, 2023 at 9:40 PM Ma, Rongrong via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:

Hello Veronika

Your latest version reads very nice to me. Thanks for addressing my comments. 

Best

Rongrong

On Aug 27, 2023, at 2:07 AM, Veronika Prozorova <v.d.prozorova AT gmail.com> wrote:

Hello Rongrong,

Thank you for the comments! Please, find the new version here: https://drupal.star.bnl.gov/STAR/system/files/PosterQM23_Prozorova_ver3.pdf

Best wishes,

Veronika

сб, 26 авг. 2023 г. в 23:38, Ma, Rongrong <marr AT bnl.gov>:

Hello Veronika

Thanks for addressing my comments. The new version looks very nice. I have only a few additional minor comments. 

RESULTS

- In Fig. 3, please remove the comma after "p_T" in the x-axis title

- function (Figure 4) -> function (Fig. 4)

- efficiencies (Figure 5) -> efficiencies (Fig. 5)

- Add "Au+Au \sqrt{s_NN} = 54.4 GeV" to both panels of Fig. 5

- In the left panel of Fig. 5, I suggest to use option "PL" in legend for the data points in different centrality bins, i.e. remove the colored box around data points in the legend, since you already have the box indicated as "sys. uncertainty"

Best

Rongrong

On Aug 26, 2023, at 4:38 PM, Veronika Prozorova <v.d.prozorova AT gmail.com> wrote:

Hello Rongrong,

Thank you very much for your comments! I have implemented them and uploaded the new version under the new entry: https://drupal.star.bnl.gov/STAR/system/files/PosterQM23_Prozorova_ver2.pdf

Regarding your question about Figure 3. This behaviour is due to the cuts we are using for the electron identification. For pT < 1.25 GeV/c we use TPC and TOF, for 1.25 < pT < 1.5 GeV/c we use TPC, TOF and BEMC, for pT >1.5 we use TPC, BEMC and TOF hybrid mode to get more statistics. More information here: https://drupal.star.bnl.gov/STAR/system/files/HFE54.4GeV_6Apr2023.pdf

As it would take a lot of space to explain this behavior I added a small note regarding the BEMC only as it catches the eye the most.

Best regards,

Veronika

пт, 25 авг. 2023 г. в 17:47, Ma, Rongrong via Star-hp-l <star-hp-l AT lists.bnl.gov>:

Hello Veronika

I was asked by the STAR management to take a look at your poster. Here are some comments for your consideration:

ABSTRACT
- Studying heavy flavor can -> Studying heavy-flavor production in heavy-ion collisions (HIC) can
- Quark-Gluon Plasma (QGP) -> Quark-Gluon Plasma (QGP) created in these collisions
- One way to study the production of heavy quarks -> One way to study heavy quarks

HEAVY-FLAVOR ELECTRONS
- semi-leptonic decays of open heavy-flavor hadrons
- It is a pT dependent fraction of electrons from both D and B hadron decays. -> Relative contributions of D and B hadron decays depend on electron p_T.
- As HFE have higher -> As semi-leptonic decays have higher
- remove "of open heavy-flavor hadrons"
- I do not think you need to introduce the concept of non-photonic electrons, which could cause confusion. I suggest to merge second and third bullets, and write Eq. (1) as: N^HFE = (N^incl * purity - N^PE/𝜀^PE)/(𝜀^total) - N^HDE
- total efficiency of identified electrons -> total efficiency of electron identification and reconstruction
- are hadron-decayed electrons: 𝜌 -> are hadron-decayed electrons from 𝜌
- e^PE sources -> N^PE sources
- remove "direct"

STAR DETECTOR
- study properties of strongly-interacting matter -> study properties of the QGP
- Particle momentum reconstruction and
- add an empty space after "dE/dx,"

PHOTONIC ELECTRONS
- are subtracted statistically from the inclusive electrons using invariant mass method -> are identified using the invariant mass method and subtracted statistically from inclusive electrons
- Figure 2, caption: PE pure sample for -> photonic electrons in
- 𝜋0 -> 𝜋^0 (0 should be the superscript)

RESULTS
- In Fig. 1, there are some distinct features: i) a bump around 1 GeV/c, ii) a sudden drop around 1.4 GeV/c, and iii) another bump around 1.6 GeV/c. Do you understand these features? Are they related to trigger bias? It will be good if you can add some explanations.
- Figure 1, caption: add a comma before "for"
- remove "In order to evaluate hadron contamination the"
- were fitted with multi-Gaussian -> are fitted with a multi-Gaussian
- (Figure 4). This is needed to -> (Figure 4), to
- Figure 4: add "Au+Au \sqrt{s_NN} = 54.4 GeV" to both panels
- TOF, BEMC -> TOF and BEMC
- calculated from data using pure photonic electron sample -> calculated using pure electron sample in data
- Figure 5, left panel: the legend indicates the systematic uncertainty is displayed as filled gray box, while I can only see open colored boxes around data points. Please make them consistent.

CONCLUSION
- Heavy-flavor electrons are a powerful -> Heavy-flavors are a powerful
- towards N^PE evaluation -> towards N^HFE evaluation
- v2 -> v_{2}
- add the reference to HFE v2 paper

REFERNECE
- Unify the reference style

Best
Rongrong


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